cart_jsp.java

来自「Internet 开发技术分章节代码和自己完成的课程设计全代码（在zuoye文件」· Java 代码 · 共 121 行

JAVA
121 行
字号 
package org.apache.jsp;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import carBean.*;
import java.util.*;

public final class cart_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {

  private static java.util.List _jspx_dependants;

  public Object getDependants() {
    return _jspx_dependants;
  }

  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {

    JspFactory _jspxFactory = null;
    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;


    try {
      _jspxFactory = JspFactory.getDefaultFactory();
      response.setContentType("text/html; charset=gb2312");
      pageContext = _jspxFactory.getPageContext(this, request, response,
      			null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("\r\n");
      out.write("\r\n");
      carBean.Book book = null;
      synchronized (session) {
        book = (carBean.Book) _jspx_page_context.getAttribute("book", PageContext.SESSION_SCOPE);
        if (book == null){
          book = new carBean.Book();
          _jspx_page_context.setAttribute("book", book, PageContext.SESSION_SCOPE);
        }
      }
      out.write('\r');
      out.write('\n');
      carBean.Cart cart = null;
      synchronized (session) {
        cart = (carBean.Cart) _jspx_page_context.getAttribute("cart", PageContext.SESSION_SCOPE);
        if (cart == null){
          cart = new carBean.Cart();
          _jspx_page_context.setAttribute("cart", cart, PageContext.SESSION_SCOPE);
          out.write('\r');
          out.write('\n');
        }
      }
      out.write("\r\n");
      out.write("<html><head><title>购物信息</title></head>\r\n");
 
 //mybook为执行的操作，add表示添加此商品，remove表示删除此商品。
   String mybook=request.getParameter("mybook");
//获得所有添加、删除的商品的itemid。		
   String items[]=request.getParameterValues("id");
   if(items!=null)
   for(int i=0;i<items.length;i++)
   {
     if(mybook.equals("add"))cart.addItem(items[i],1);
     else if(mybook.equals("remove")) cart.removeItem(items[i]);   
   } 
  
      out.write("\r\n");
      out.write("<body><center><H2><B>一个简单的购物车</B></H2><br>\r\n");
      out.write("<form action=\"cart.jsp\" method=GET>\r\n");
      out.write("<table width=\"75%\" border=\"1\" >\r\n");
      out.write(" ");

   HashMap cart_item=cart.getItems();
   Iterator it=cart_item.keySet().iterator();
   while(it.hasNext())
    {
      String id=(String)it.next();
      Item item=book.getItem(id);
  
      out.write("\r\n");
      out.write("  <tr>\r\n");
      out.write("    <td><input type=\"checkbox\" name=\"id\" value=\"");
      out.print(item.getId());
      out.write("\"></td>   \r\n");
      out.write("    <td>");
      out.print(item.getBookName());
      out.write("</td>\r\n");
      out.write(" </tr>\r\n");
      out.write("  ");
}
      out.write("\r\n");
      out.write(" <tr><td><a href=\"buybook.jsp\">购物</a></td>\r\n");
      out.write(" <td><input type=submit value=\"remove\" name=\"mybook\"></td></tr> \r\n");
      out.write("</table>\r\n");
      out.write("</form></center></body></html>\r\n");
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          out.clearBuffer();
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}

cart_jsp.java - 源码说明

本页面展示了「Internet 开发技术分章节代码和自己完成的课程设计全代码（在zuoye文件夹里）使用时」中的 cart_jsp.java 源码文件，采用 Java 编程语言编写，共 121 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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